31. Laser communicator V2

Back in August 2016, I built a laser communicator, using a transistor, a laser module, and passive electronic components. This particular circuit uses an NPN transistor as a preamp, which amplified the signal from the audio source, such as an mp3 player, and converts it into electric signals which feed to the laser module.

<Wiring>

  There, the laser emits a beam of electricity, with different wavelengths corresponding to the electric signals being mixed in. Then, it hits the solar panel, so that the light gets converted back into electricity, and flows to the amplifier, which you can hear as sounds!

<Entire unit>

It's a neat project, since this is one way to transmit music through the air, and this is one of them. Not only that, but it can experiment, such as using a different laser, a different value for the resistors, and so on. What makes this laser communicator different from the 2016 version is that not only is it contained in a small container, with a hinged lid, but it has 2 laser pointers, which means that it's stereo instead of mono.

<Recievers>

There are certain flaws since other light can interfere with the solar beam, giving out certain distortions from the amplifier. Another thing is when there is too much signal being pumped in at the same time, it also causes distortions.

Still, this is quite a way to transmit music and shows that anything can be converted.

 

 <Laser test>

<Stereo Circuit>